Remoção de micro-organismos patógenos de resíduos sépticos em leitos com e sem vegetação
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Data
2015
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Resumo
Septic wastes (SW) have high organic load and levels of pathogenic organisms,
which limit their agricultural use or disposal in water bodies. So they should be
adequately treated before the final disposal, preferably by simple and low cost technologies. This study aimed to compare the efficiency of constructed wetlands
beds in the SW sanitation. Two cells were built, dug in the ground and filled with
overlapping layers of gravel and sand for application and treatment of SW. One of
the cells was cultivated by the plant specie Vetiver Grass (Chrysopogon zizanioides)
and the other remained without vegetation. SW was applied to the surface of beds
and evaluated their efficacy in the removal of pathogenic load by analysis of total
coliforms, Escherichia coli, Salmonella spp. and viable helminth eggs. SW of
pathogen removal efficiency in the treated liquid fraction was slightly higher in the
bed with plants. Pathogen reduction from the sludge accumulated on the surface of
the beds was slightly faster in the tank without vegetation.
Descrição
Palavras-chave
Alagados construídos, Esgoto séptico, Higienização, Constructed wetlands, Sanitation, Septic sewage
Citação
SILVA JÚNIOR, Édio Damásio da et al. Remoção de micro-organismos patógenos de resíduos sépticos em leitos com e sem vegetação. Enciclopédia Biosfera, Jandaía, v. 11, n. 21, p. 3021-3034, 2015.